Translated from Latin by Thomas Winter, the associate
professor of classics at the University of Nebraska, it reads as
follows:

"Chapter IX  On apparent and real
dimensions of stars

[ ]

The first way to observe the diameters of stars
depends on ocular estimate, and on comparison either with the
diameter of the moon, or  so its brightness won't be a
problem  with the known distance of fixed stars close
together to each other, the pure distance of the Pleiades, the
Hyades, or the Goats to each other, by estimating how many such
stars would be needed to fill that interval. This conjecture is, of
course, liable to error, especially on account of artificial rays
enlarging the stars and shrinking the intervals, the way that there appears to be one star in the middle of the
Great Bear's tail, when there are actually two, as the telescope
reveals. On this account, Galileo (Dialogo dei Massimi
Sistemi del Mundo, volume terzo) thinks it better that diameters
be observed in a luminous ambience, near the sun or moon, because
then they are stripped of those spurious rays, just as it appears
when Venus is seen by day, and in lamp flames seen by day at some
distance, and I have frequently experienced in full moons."